Illinois area code list
Our directory contains all Illinois area codes, which may be helpful if you are looking for who is calling you from an unknown number. There are many ways for scammers to obtain databases of phone numbers, but we can stop them by blocking their numbers and spreading the information about scammers.
Usage Statistics
Carrier Statistics
Check Illinois city list and find where the calls are coming from. If it is a scammer calling, you will certainly find them in our reverse phone lookup directory. You can also contribute by leaving comments with the information about a caller. There’s no doubt that it will help other users to block these numbers right away and to prevent possible unwanted calls.
| City | Prefix | Usage | Carrier |
|---|---|---|---|
| New Baden |
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| New Berlin |
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| New Boston |
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| New Canton |
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| New Douglas |
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| New Holland |
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| New Lenox |
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| New Windsor |
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| Niota |
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| Noble |
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| Nokomis |
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| Norris City |
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| North Pekin |
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| Northbrook |
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| O Fallon |
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| Oak Brook |
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| Oak Forest |
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| Oak Lawn |
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| Oak Park |
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| Oakford |
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| Oakwood |
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| Oblong |
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| Oconee |
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| Odell |
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| Odin |
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| Ogden |
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| Oglesby |
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| Ohio |
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| Okawville |
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| Olive Branch |
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| Olmsted |
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| Olney |
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| Onarga |
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| Oneida |
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| Oquawka |
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| Orangeville |
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| Orchardville |
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| Oreana |
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| Oregon |
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| Orion |
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| Orland Park |
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| Osco |
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| Oswego |
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| Ottawa |
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| Owaneco |
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| Palatine |
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| Palmyra |
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| Palos Park |
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| Pana |
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| Park Forest |
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